Răspuns :
x+3/5(x)=6480........notam: x=5y ..si... 3/5(x)=3y
---------------------
x=?
x) |___|___|___|___|___|=>x=5y
3/5(x) |___|___|___|=>3/5(x)=3y
--------------------------------------
5y+3y=6480
8y=6480
y=6480:8
y=810
x=810*5
x=4050
3/5(x)=810*3
3/5(x)=2430
4050+(4050:5)*3=
=4050+810*3
=4050+2430
=6480
---------------------
x=?
x) |___|___|___|___|___|=>x=5y
3/5(x) |___|___|___|=>3/5(x)=3y
--------------------------------------
5y+3y=6480
8y=6480
y=6480:8
y=810
x=810*5
x=4050
3/5(x)=810*3
3/5(x)=2430
4050+(4050:5)*3=
=4050+810*3
=4050+2430
=6480